@layer reset, tokens, base, layout, components, dialogs, utilities;

@layer reset {
  *, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    color-scheme: dark;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
  }

  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-behavior: auto;
    }
  }

  img, picture, video, canvas, svg {
    display: block;
    max-inline-size: 100%;
  }

  input, button, textarea, select {
    font: inherit;
    color: inherit;
  }
}

@layer tokens {
  :root {
    /* Gallery Obsidian & Warm Putty Surfaces */
    --bg-canvas: #0b0d10;
    --bg-surface-1: #13171d;
    --bg-surface-2: #1a2029;
    --bg-surface-3: #232b37;
    --bg-glass: rgba(15, 18, 24, 0.84);

    /* Eurorack Faceplate Hairlines & Borders */
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-mid: rgba(255, 255, 255, 0.15);
    --border-strong: rgba(255, 255, 255, 0.28);

    /* Typography Hierarchy */
    --text-primary: #f3f5f8;
    --text-secondary: #a2acb9;
    --text-muted: #6e7887;
    --text-mono: #d5dce6;

    /* Semantic Signal Accents (LEDs, Veroboard Copper, Voxel Light) */
    --accent-ai: #38bdf8;
    --accent-ai-soft: rgba(56, 189, 248, 0.14);
    --accent-alife: #34d399;
    --accent-alife-soft: rgba(52, 211, 153, 0.14);
    --accent-hardware: #f59e0b; /* Direct nod to 2008 2ne1.com #ffb030 */
    --accent-hardware-soft: rgba(245, 158, 11, 0.15);
    --accent-archive: #a78bfa;
    --accent-archive-soft: rgba(167, 139, 250, 0.15);
    --accent-curiosity: #fb7185;
    --accent-curiosity-soft: rgba(251, 113, 133, 0.15);

    /* Typography Stacks */
    --font-display: 'Space Grotesk', system-ui, -apple-system, sans-serif;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

    /* Layout & Radii */
    --max-w: 1320px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-pill: 999px;
    --ease-spring: cubic-bezier(0.22, 1, 0.36, 1);
  }
}

@layer base {
  body {
    background-color: var(--bg-canvas);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.65;
    min-block-size: 100dvh;
    overflow-x: clip;
    selection-background-color: var(--accent-ai);
  }

  ::selection {
    background: rgba(56, 189, 248, 0.28);
    color: #fff;
  }

  h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.18;
    letter-spacing: -0.02em;
    color: var(--text-primary);
  }

  a {
    color: inherit;
    text-decoration: none;
    transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
  }

  :focus-visible {
    outline: 2px solid var(--accent-ai);
    outline-offset: 3px;
    border-radius: 4px;
  }

  /* Cross-document MPA View Transitions */
  @media (prefers-reduced-motion: no-preference) {
    @view-transition {
      navigation: auto;
    }
  }
}

@layer layout {
  .container {
    width: min(100% - 2.5rem, var(--max-w));
    margin-inline: auto;
  }

  /* Staging Preview Banner */
  .staging-bar {
    background: linear-gradient(90deg, rgba(245, 158, 11, 0.16), rgba(56, 189, 248, 0.14));
    border-block-end: 1px solid var(--border-subtle);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding-block: 0.45rem;
    color: var(--text-mono);
  }

  .staging-bar__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
  }

  .staging-bar a {
    color: var(--accent-hardware);
    text-decoration: underline;
    text-underline-offset: 3px;
  }

  /* Sticky Top Navigation Header */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--bg-glass);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-block-end: 1px solid var(--border-subtle);
  }

  .site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-block-size: 3.75rem;
    padding-block: 0.5rem;
    flex-wrap: wrap;
  }

  .brand-lockup {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
  }

  .brand-badge {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.06em;
    padding: 0.22rem 0.55rem;
    background: var(--text-primary);
    color: var(--bg-canvas);
    border-radius: 4px;
    transition: transform 0.2s var(--ease-spring), background-color 0.2s ease;
  }

  .brand-lockup:hover .brand-badge {
    background: var(--accent-hardware);
    transform: translateY(-1px);
  }

  .brand-name {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.98rem;
    color: var(--text-primary);
  }

  .brand-role {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
    display: none;
  }

  @media (min-width: 900px) {
    .brand-role {
      display: inline;
    }
  }

  .site-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.25rem;
  }

  .site-nav a {
    font-size: 0.86rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 0.38rem 0.72rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
  }

  .site-nav a:hover,
  .site-nav a[aria-current="page"] {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
  }

  .site-nav a.nav-noodles {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    color: var(--accent-hardware);
    border: 1px solid rgba(245, 158, 11, 0.28);
    background: rgba(245, 158, 11, 0.07);
    margin-inline-start: 0.25rem;
  }

  .site-nav a.nav-noodles:hover {
    background: rgba(245, 158, 11, 0.18);
  }

  /* Hero Section with Living Voxel Substrate */
  .hero {
    position: relative;
    overflow: hidden;
    border-block-end: 1px solid var(--border-subtle);
    padding-block: clamp(2.75rem, 6vw, 4.75rem);
    background:
      radial-gradient(circle at 78% 35%, rgba(56, 189, 248, 0.11), transparent 52%),
      radial-gradient(circle at 22% 80%, rgba(245, 158, 11, 0.08), transparent 48%),
      var(--bg-canvas);
  }

  .hero__canvas {
    position: absolute;
    inset: 0;
    inline-size: 100%;
    block-size: 100%;
    pointer-events: none;
    opacity: 0.85;
  }

  .hero__inner {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: end;
  }

  @media (min-width: 960px) {
    .hero__inner {
      grid-template-columns: 1.45fr 0.85fr;
    }
  }

  .hero__kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    font-family: var(--font-mono);
    font-size: 0.76rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-ai);
    margin-block-end: 0.9rem;
  }

  .pulse-dot {
    inline-size: 8px;
    block-size: 8px;
    border-radius: 50%;
    background: var(--accent-alife);
    box-shadow: 0 0 10px var(--accent-alife);
  }

  .hero__title {
    font-size: clamp(2.1rem, 4.2vw + 0.5rem, 3.65rem);
    letter-spacing: -0.03em;
    margin-block-end: 1.1rem;
    max-inline-size: 20ch;
    inline-size: fit-content;
  }

  .hero__title em {
    font-style: normal;
    background: linear-gradient(120deg, #fff 20%, var(--accent-ai) 65%, var(--accent-alife) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .hero__lead {
    font-size: clamp(1.02rem, 1.1vw + 0.6rem, 1.18rem);
    color: var(--text-secondary);
    max-inline-size: 64ch;
    margin-block-end: 1.5rem;
  }

  .hero__lead strong {
    color: var(--text-primary);
    font-weight: 500;
  }

  .hero__thats-right {
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--accent-hardware);
    padding: 0.1rem 0.45rem;
    background: var(--accent-hardware-soft);
    border-radius: 4px;
  }

  .hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    align-items: center;
  }

  /* Hero Telemetry & Substrate Controls Box */
  .substrate-hud {
    background: rgba(19, 23, 29, 0.78);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-mid);
    border-radius: var(--radius-md);
    padding: 1rem 1.15rem;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
  }

  .substrate-hud__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
    font-weight: 600;
    border-block-end: 1px solid var(--border-subtle);
    padding-block-end: 0.45rem;
  }

  .substrate-hud__metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
  }

  .hud-metric {
    background: rgba(255, 255, 255, 0.03);
    padding: 0.4rem 0.55rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
  }

  .hud-metric__label {
    display: block;
    font-size: 0.65rem;
    color: var(--text-muted);
  }

  .hud-metric__val {
    font-size: 0.82rem;
    color: var(--accent-alife);
    font-weight: 600;
  }

  .substrate-hud__modes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    align-items: center;
  }

  .hud-mode-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    padding: 0.24rem 0.55rem;
    border-radius: 4px;
    font-size: 0.68rem;
    cursor: pointer;
    transition: all 0.15s ease;
  }

  .hud-mode-btn:hover,
  .hud-mode-btn[aria-pressed="true"] {
    background: var(--accent-ai-soft);
    border-color: var(--accent-ai);
    color: var(--text-primary);
  }

  /* Sticky Lens & Timeline Bar */
  .lens-bar {
    position: sticky;
    top: 3.75rem;
    z-index: 40;
    background: rgba(11, 13, 16, 0.88);
    backdrop-filter: blur(12px);
    border-block-end: 1px solid var(--border-subtle);
    padding-block: 0.65rem;
  }

  .lens-bar__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
  }

  .lens-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.38rem;
  }

  .lens-btn {
    background: var(--bg-surface-1);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    padding: 0.35rem 0.78rem;
    border-radius: var(--radius-pill);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.18s var(--ease-spring);
  }

  .lens-btn:hover {
    border-color: var(--border-strong);
    color: var(--text-primary);
  }

  .lens-btn[aria-pressed="true"] {
    background: var(--text-primary);
    color: var(--bg-canvas);
    border-color: var(--text-primary);
    font-weight: 600;
  }

  .lens-count {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    opacity: 0.75;
  }

  .view-toggle {
    display: inline-flex;
    background: var(--bg-surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-pill);
    padding: 0.18rem;
  }

  .view-toggle button {
    background: transparent;
    border: none;
    padding: 0.28rem 0.72rem;
    border-radius: var(--radius-pill);
    font-family: var(--font-mono);
    font-size: 0.73rem;
    color: var(--text-secondary);
    cursor: pointer;
  }

  .view-toggle button[aria-pressed="true"] {
    background: var(--bg-surface-3);
    color: var(--text-primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  }

  /* Main Sections & Deferred Rendering */
  .shop-section {
    padding-block: clamp(2.5rem, 5vw, 4rem);
    border-block-end: 1px solid var(--border-subtle);
  }

  .shop-section--deferred {
    content-visibility: auto;
    contain-intrinsic-size: auto none auto 520px;
  }

  .section-header {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-block-end: 1.75rem;
  }

  .section-kicker {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    display: block;
    margin-block-end: 0.3rem;
  }

  .section-title {
    font-size: clamp(1.45rem, 2.2vw + 0.4rem, 2.1rem);
  }

  .section-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-inline-size: 62ch;
  }

  /* Bento & Subgrid Project Cards */
  .bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-auto-rows: auto auto 1fr auto;
    gap: 1.35rem;
  }

  .project-card {
    grid-column: span 12;
    grid-row: span 4;
    display: grid;
    /* Same-cascade fallback before subgrid (modern-web-guidance: css-layout) */
    grid-template-rows: auto auto 1fr auto;
    grid-template-rows: subgrid;
    container: card / inline-size;
    background: var(--bg-surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform 0.24s var(--ease-spring), border-color 0.24s ease, box-shadow 0.24s ease;
    position: relative;
  }

  .project-card:hover {
    transform: translateY(-3px);
    border-color: var(--border-strong);
    box-shadow: 0 18px 40px -15px rgba(0, 0, 0, 0.65);
  }

  @media (min-width: 760px) {
    .project-card--span-6 { grid-column: span 6; }
    .project-card--span-4 { grid-column: span 6; }
    .project-card--span-8 { grid-column: span 12; }
  }

  @media (min-width: 1080px) {
    .project-card--span-8 { grid-column: span 7; }
    .project-card--span-5 { grid-column: span 5; }
    .project-card--span-6 { grid-column: span 6; }
    .project-card--span-4 { grid-column: span 4; }
    .project-card--span-3 { grid-column: span 3; }
  }

  .project-card[hidden] {
    display: none !important;
  }

  /* Scroll-Driven Card Entry Animation (modern-web-guidance: scroll-entry-exit-effects) */
  @media (prefers-reduced-motion: no-preference) {
    @supports ((animation-timeline: view()) and (animation-range: entry)) {
      @keyframes card-reveal {
        from {
          opacity: 0.15;
          transform: translateY(20px) scale(0.985);
        }
        to {
          opacity: 1;
          transform: translateY(0) scale(1);
        }
      }

      .shop-section--deferred .project-card {
        animation: card-reveal linear both;
        animation-timeline: view();
        animation-range: entry 4% cover 20%;
      }
    }
  }
}

@layer components {
  /* Card Top Metadata Bar */
  .card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.85rem 1.15rem 0.65rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    border-block-end: 1px solid var(--border-subtle);
    background: rgba(255, 255, 255, 0.015);
  }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.16rem 0.55rem;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .badge--ai { background: var(--accent-ai-soft); color: var(--accent-ai); }
  .badge--alife { background: var(--accent-alife-soft); color: var(--accent-alife); }
  .badge--hardware { background: var(--accent-hardware-soft); color: var(--accent-hardware); }
  .badge--archive { background: var(--accent-archive-soft); color: var(--accent-archive); }
  .badge--curiosity { background: var(--accent-curiosity-soft); color: var(--accent-curiosity); }

  .card-year {
    color: var(--text-muted);
  }

  /* Card Media Frame */
  .card-media {
    position: relative;
    aspect-ratio: 16 / 9.5;
    background: #080a0d;
    overflow: hidden;
    border-block-end: 1px solid var(--border-subtle);
  }

  .card-media img {
    inline-size: 100%;
    block-size: 100%;
    object-fit: cover;
    transition: transform 0.45s var(--ease-spring), filter 0.35s ease;
  }

  .project-card:hover .card-media img {
    transform: scale(1.03);
  }

  /* PaperPiAI Bistable E-Ink Flash Animation */
  @keyframes eink-flash {
    0% { filter: none; }
    25% { filter: invert(1) contrast(250%) grayscale(1); }
    55% { filter: grayscale(1) contrast(320%) brightness(1.25); }
    80% { filter: invert(0.85) grayscale(1) contrast(180%); }
    100% { filter: none; }
  }

  .is-eink-refreshing img {
    animation: eink-flash 0.48s steps(4) forwards;
  }

  /* Evolution & Foundation Interactive Generation Scrubber Overlay */
  .evo-scrubber-bar {
    position: absolute;
    inset-inline: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(11, 13, 16, 0.96) 20%, rgba(11, 13, 16, 0.65) 75%, transparent);
    padding: 0.75rem 0.95rem 0.6rem;
    display: flex;
    flex-direction: column;
    gap: 0.38rem;
  }

  .evo-scrubber-rationale {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-primary);
    line-height: 1.35;
    background: rgba(19, 23, 29, 0.85);
    border-inline-start: 2px solid var(--accent-ai);
    padding: 0.3rem 0.55rem;
    border-radius: 0 4px 4px 0;
  }

  .evo-scrubber-pills {
    display: flex;
    gap: 0.3rem;
    flex-wrap: wrap;
  }

  .evo-gen-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: var(--text-mono);
    font-family: var(--font-mono);
    font-size: 0.66rem;
    padding: 0.15rem 0.48rem;
    border-radius: 4px;
    cursor: pointer;
  }

  .evo-gen-btn[aria-pressed="true"],
  .evo-gen-btn:hover {
    background: var(--accent-ai);
    color: #000;
    border-color: var(--accent-ai);
    font-weight: 700;
  }

  /* Card Body & Actions */
  .card-body {
    padding: 1.15rem 1.25rem 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .card-title {
    font-size: clamp(1.18rem, 1.3vw + 0.5rem, 1.45rem);
    inline-size: fit-content;
  }

  .card-title a:hover {
    color: var(--accent-ai);
  }

  .card-summary {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.58;
  }

  .card-footer {
    padding: 0.75rem 1.25rem 1.1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    align-items: center;
    border-block-start: 1px solid rgba(255, 255, 255, 0.04);
  }

  /* Buttons & Action Chips */
  .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-sans);
    font-size: 0.84rem;
    font-weight: 600;
    padding: 0.52rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-mid);
    background: var(--bg-surface-2);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.18s ease;
  }

  .btn:hover {
    background: var(--bg-surface-3);
    border-color: var(--border-strong);
  }

  .btn--primary {
    background: var(--text-primary);
    color: var(--bg-canvas);
    border-color: var(--text-primary);
  }

  .btn--primary:hover {
    background: var(--accent-ai);
    border-color: var(--accent-ai);
    color: #000;
  }

  .chip {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 0.28rem 0.62rem;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    color: var(--text-mono);
    cursor: pointer;
    transition: all 0.16s ease;
  }

  .chip:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--border-strong);
    color: #fff;
  }

  .chip--highlight {
    background: var(--accent-ai-soft);
    border-color: rgba(56, 189, 248, 0.35);
    color: var(--accent-ai);
  }

  .chip--highlight:hover {
    background: var(--accent-ai);
    color: #000;
  }

  .chip--amber {
    background: var(--accent-hardware-soft);
    border-color: rgba(245, 158, 11, 0.35);
    color: var(--accent-hardware);
  }

  .chip--amber:hover {
    background: var(--accent-hardware);
    color: #000;
  }

  /* Chronological Lineage Timeline View (1997-2026) */
  .timeline-view {
    display: none;
    position: relative;
    padding-inline-start: 1.75rem;
    border-inline-start: 2px solid var(--border-mid);
    margin-inline-start: 0.75rem;
  }

  body[data-view-mode="timeline"] .timeline-view {
    display: block;
  }

  body[data-view-mode="timeline"] .grid-only-section {
    display: none;
  }

  .timeline-era {
    position: relative;
    margin-block-end: 2.75rem;
  }

  .timeline-era::before {
    content: "";
    position: absolute;
    inset-inline-start: -2.2rem;
    top: 0.35rem;
    inline-size: 12px;
    block-size: 12px;
    border-radius: 50%;
    background: var(--accent-ai);
    border: 2px solid var(--bg-canvas);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.22);
  }

  .timeline-era__header {
    margin-block-end: 1rem;
  }

  .timeline-era__years {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-hardware);
    font-weight: 700;
  }

  .timeline-era__title {
    font-size: 1.35rem;
  }

  .timeline-items {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
    gap: 1rem;
  }

  .timeline-node {
    background: var(--bg-surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
  }

  /* Case Study Article Layout (for subpages) */
  .case-hero {
    padding-block: clamp(2.25rem, 5vw, 3.75rem);
    border-block-end: 1px solid var(--border-subtle);
    background:
      radial-gradient(circle at 80% 20%, rgba(56, 189, 248, 0.1), transparent 50%),
      var(--bg-canvas);
  }

  .breadcrumb {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    color: var(--text-secondary);
    margin-block-end: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
  }

  .breadcrumb a:hover {
    color: var(--accent-ai);
  }

  .specs-ribbon {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.85rem;
    margin-block-start: 1.75rem;
    padding: 1rem;
    background: var(--bg-surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
  }

  .spec-item__label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    color: var(--text-muted);
    display: block;
  }

  .spec-item__value {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    color: var(--text-primary);
    font-weight: 600;
  }

  .prose-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding-block: 2.75rem;
  }

  @media (min-width: 960px) {
    .prose-grid {
      grid-template-columns: 1.65fr 1fr;
    }
  }

  .prose h2 {
    font-size: 1.55rem;
    margin-block: 1.75rem 0.75rem;
  }

  .prose h2:first-child {
    margin-block-start: 0;
  }

  .prose h3 {
    font-size: 1.15rem;
    margin-block: 1.35rem 0.45rem;
    color: var(--accent-ai);
  }

  .prose p, .prose li {
    color: var(--text-secondary);
    margin-block-end: 1rem;
    max-inline-size: 68ch;
  }

  .prose ul {
    padding-inline-start: 1.25rem;
  }

  .prose strong {
    color: var(--text-primary);
  }

  /* Footer */
  .site-footer {
    padding-block: 3rem;
    background: #080a0c;
    color: var(--text-muted);
    font-size: 0.86rem;
  }

  .site-footer__inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
  }

  .social-links {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
  }
}

@layer dialogs {
  /* Native <dialog> Specimen Drawer (modern-web-guidance: animate-to-from-top-layer) */
  dialog.specimen-dialog {
    margin: auto;
    inline-size: min(94vw, 860px);
    max-block-size: 88dvh;
    background: var(--bg-surface-1);
    color: var(--text-primary);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-lg);
    padding: 0;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.85);
    overflow-y: auto;
  }

  dialog.specimen-dialog::backdrop {
    background: rgba(5, 7, 10, 0.78);
    backdrop-filter: blur(6px);
  }

  @media (prefers-reduced-motion: no-preference) {
    dialog.specimen-dialog.supports-discrete {
      opacity: 0;
      transform: translateY(16px) scale(0.98);
      transition: opacity 0.24s ease, transform 0.24s var(--ease-spring), display 0.24s ease, overlay 0.24s ease;
      transition-behavior: allow-discrete;
    }

    dialog.specimen-dialog.supports-discrete[open] {
      opacity: 1;
      transform: translateY(0) scale(1);
    }

    @starting-style {
      dialog.specimen-dialog.supports-discrete[open] {
        opacity: 0;
        transform: translateY(16px) scale(0.98);
      }
    }
  }

  .dialog-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    padding: 1rem 1.35rem;
    border-block-end: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
  }

  .dialog-body {
    padding: 1.5rem 1.35rem;
  }

  .dialog-nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.35rem;
    border-block-start: 1px solid var(--border-subtle);
    background: rgba(255, 255, 255, 0.02);
    font-family: var(--font-mono);
    font-size: 0.75rem;
  }
}

@layer utilities {
  .sr-only {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
}